Can Your Personality Actually Change? What Science Says About Personal Growth

You have probably heard it before: "People never really change." Maybe you have even said it yourself after watching a friend fall back into old patterns or a colleague repeat the same mistakes. This belief is so embedded in our culture that it shapes how we approach relationships, career decisions, and even our own potential for growth.

But what if this conventional wisdom is wrong?

Over the past two decades, personality science has undergone a quiet revolution. Research now shows that personality is not the fixed, immutable thing we once believed. Your Big Five personality traits can and do change throughout your life, both through natural development and intentional effort.

The question is no longer whether personality can change, but how, why, and to what degree.

The Old View: Personality as Set in Stone

For most of psychology's history, personality was considered largely fixed by early adulthood. The prevailing view, crystallized in William James's famous 1890 assertion that character is "set like plaster" by age 30, suggested that who you are by your late twenties is essentially who you will always be.

This idea had intuitive appeal. We all know people who seem fundamentally the same across decades. Your aunt who was always anxious is still anxious at 70. Your college roommate who was disorganized back then remains disorganized today.

But this view confused consistency with immutability. Yes, people often remain relatively consistent. But consistency is not the same as being incapable of change.

What Modern Research Actually Shows

Personality Develops Throughout Life

A landmark coordinated analysis of 16 longitudinal studies, comprising over 60,000 participants, fundamentally changed our understanding of personality development (Roberts & Mroczek, 2008). The findings were clear: personality traits continue to evolve well into adulthood and even late life.

The patterns are striking:

• Conscientiousness tends to increase from adolescence through middle age, as people take on more responsibilities
• Agreeableness generally rises with age, particularly after people enter committed relationships and become parents
• Neuroticism typically decreases from early adulthood through the 60s, meaning people become more emotionally stable
• Openness shows a more complex pattern, often increasing in young adulthood before gradually declining in later life
• Extraversion shows modest declines with age, though the social vitality component remains more stable

These changes are not trivial. Research by Rodica Damian and colleagues found that over 50 years, some individuals showed personality changes large enough to be clearly visible to others (Damian et al., 2019). We are not talking about subtle statistical shifts but meaningful transformations in how people think, feel, and behave.

Not Everyone Changes the Same Way

Perhaps the most fascinating finding is that personality stability itself varies between individuals. Some people maintain remarkably consistent personalities throughout their lives, while others transform dramatically.

A comprehensive meta-analysis of longitudinal studies found that "personality stability" functions almost like a meta-trait, with significant individual differences in how much people change over time (Bleidorn et al., 2022). At your high school reunion, you will notice that some classmates seem exactly the same as they were at 18, while others are nearly unrecognizable in their demeanor and outlook.

What determines who changes and who stays the same? Researchers point to several factors:

1. Major life transitions: Starting a new career, becoming a parent, experiencing significant loss, or moving to a new country can catalyze personality change
2. Intentional effort: People who actively work on changing specific traits tend to succeed, especially when they implement concrete behavioral strategies
3. Mental health: Both improvement and deterioration in mental health are associated with personality shifts
4. Social environment: Long-term relationships and social contexts can gradually shape personality over time

Volitional Personality Change: Changing on Purpose

This brings us to one of the most exciting areas of modern personality research: volitional personality change (VPC), the deliberate, self-directed effort to change your own traits.

The Research Landscape

A recent systematic review published in Communications Psychology analyzed 30 empirical studies on VPC with over 7,700 participants (Haehner et al., 2024). The findings offer both caution and hope.

The cautionary finding: Simply wanting to change your personality is only weakly related to actual change. If you wake up one morning deciding you want to be more extraverted, that intention alone will not transform you.

The hopeful finding: Structured VPC interventions actually work, with an effect size of d = 0.22. More impressively, these changes tend to last and even increase during follow-up periods (d = 0.37). When people complete behavioral challenges designed to cultivate specific traits, they experience genuine, lasting change.

What Actually Works

Research by Nathan Hudson and colleagues has identified what separates successful personality change from wishful thinking:

1. Behavioral implementation is essential. You cannot think your way to a new personality. Change requires consistently acting in trait-aligned ways. Want to become more conscientious? You need to actually organize your space, meet deadlines, and follow through on commitments, repeatedly, until these behaviors become natural.

2. Implementation intentions accelerate change. In two 16-week studies, participants who set specific "if-then" plans ("If I'm at a party, then I will introduce myself to at least one new person") achieved greater trait changes than those with only general goals.

3. Small, consistent actions beat dramatic overhauls. Personality change is not about reinventing yourself overnight. It is about accumulating small behavioral shifts that gradually reshape your default patterns.

4. The change must be self-directed. Trying to change your personality because someone else wants you to rarely works. The desire for change needs to come from within.

How Much Can Personality Really Change?

Let us be honest about the limits. While personality can change, it does not change infinitely or effortlessly.

The Realistic Picture

• Gradual, not dramatic: Personality change typically happens slowly, over months or years, not days or weeks
• Modest, not revolutionary: Most people shift by about half a standard deviation over their lifetime on any given trait
• Within bounds: Your personality at 50 will likely still be recognizable to your 20-year-old self, even if meaningfully different
• Easier in some directions: Research suggests it is generally easier to increase in traits like conscientiousness and agreeableness than to dramatically reduce neuroticism

What This Means for You

The science suggests a middle path between the "people never change" pessimism and the "you can become anyone" magical thinking.

You cannot will yourself into a completely different personality. But you can:

• Gradually develop the traits that matter most to your goals
• Create conditions that support the kind of person you want to become
• Work with your natural tendencies rather than fighting against them entirely
• Leverage life transitions as opportunities for intentional growth

The Role of Life Experiences

While intentional effort matters, so does lived experience. Major life events shape personality in predictable ways:

Relationships

Entering a committed relationship is associated with increases in conscientiousness and decreases in neuroticism. The daily practice of considering another person's needs and maintaining shared commitments appears to cultivate these traits naturally.

Parenthood

Becoming a parent tends to increase agreeableness and emotional stability, though often with temporary increases in neuroticism during the stressful early years.

Career

Professional roles shape personality over time. Leadership positions are associated with increases in extraversion and conscientiousness. Creative roles correlate with maintained or increased openness.

Adversity

Interestingly, overcoming significant challenges can lead to personality growth. Post-traumatic growth research shows that people who successfully navigate major difficulties often emerge with greater emotional stability and openness.

Why This Matters for Self-Understanding

Understanding that personality can change has profound implications for how you approach self-knowledge and personal development.

Beyond Fixed Labels

If you have ever taken a personality assessment and felt boxed in by your results, the research on personality change offers liberation. Your personality profile is not a life sentence. It is a snapshot of where you are now, not a prediction of where you must always be.

This does not mean your current personality does not matter. Your traits have real implications for your relationships, career fit, and wellbeing. But they are a starting point, not an endpoint.

Growth-Oriented Self-Understanding

At Plexality, we take a development-focused approach to personality assessment. Rather than telling you "this is who you are," we help you understand:

• Where you currently fall on the Big Five dimensions
• How your personality patterns affect your relationships and life satisfaction
• Which traits you might want to develop based on your goals
• Practical strategies for cultivating the qualities that matter to you

The goal is not to change who you are at your core. It is to help you become the best version of yourself.

Practical Steps for Personality Development

If you want to cultivate specific traits, research suggests these evidence-based approaches:

1. Start with Self-Awareness

Before trying to change, understand your current personality clearly. Take a scientifically validated assessment (like those based on the Big Five) and reflect honestly on your results. Identify specific traits you want to develop and why they matter to you.

2. Set Specific, Behavioral Goals

Do not just decide to "be more outgoing." Instead, set concrete behavioral targets: "I will initiate one conversation with a colleague each day" or "I will attend one social event per week and stay for at least an hour."

3. Use Implementation Intentions

Create if-then plans that link situational cues to desired behaviors. "If I feel the urge to procrastinate, then I will work on the task for just five minutes." These automatic triggers help bridge the gap between intention and action.

4. Track Progress

Keep a simple log of your trait-relevant behaviors. This accountability helps maintain motivation and allows you to see gradual progress that might otherwise go unnoticed.

5. Be Patient

Remember that personality change is measured in months and years, not days. Celebrate small wins and trust the process.

The Bottom Line

The science is clear: your personality can change. It changes naturally as you age and navigate life's experiences. And it can change intentionally when you commit to sustained behavioral effort.

This does not mean personality change is easy or that any change is possible. But it does mean that if you are unhappy with certain aspects of how you show up in the world, you are not stuck.

The person you were at 20 does not have to be the person you are at 40. The traits that hold you back today can be developed over time. The growth you long for is possible, one small action at a time.

Understanding your personality is the first step. Knowing that it can evolve is the second. Taking action is the third.

---

Curious about where you currently stand on the Big Five dimensions and how your personality shapes your relationships and potential? Discover your personality profile with Plexality's scientifically grounded assessment.

References

• Bleidorn, W., Schwaba, T., Zheng, A., Hopwood, C. J., Sosa, S. S., Roberts, B. W., & Briley, D. A. (2022). Personality stability and change: A meta-analysis of longitudinal studies. Psychological Bulletin, 148(7-8), 588-619. https://doi.org/10.1037/bul0000365

• Damian, R. I., Spengler, M., Sutu, A., & Roberts, B. W. (2019). Sixteen going on sixty-six: A longitudinal study of personality stability and change across 50 years. Journal of Personality and Social Psychology, 117(3), 674-695.

• Haehner, P., Wright, A., & Bleidorn, W. (2024). A systematic review of volitional personality change research. Communications Psychology, 2, 115. https://doi.org/10.1038/s44271-024-00167-5

• Hudson, N. W., & Fraley, R. C. (2015). Volitional personality trait change: Can people choose to change their personality traits? Journal of Personality and Social Psychology, 109(3), 490-507.

• Hudson, N. W., Briley, D. A., Chopik, W. J., & Derringer, J. (2019). You have to follow through: Attaining behavioral change goals predicts volitional personality change. Journal of Personality and Social Psychology, 117(4), 839-857.

• Roberts, B. W., & Mroczek, D. (2008). Personality trait change in adulthood. Current Directions in Psychological Science, 17(1), 31-35.

• Roberts, B. W., Walton, K. E., & Viechtbauer, W. (2006). Patterns of mean-level change in personality traits across the life course: A meta-analysis of longitudinal studies. Psychological Bulletin, 132(1), 1-25.

• Stieger, M., Fluckiger, C., Ruegger, D., Kowatsch, T., Roberts, B. W., & Allemand, M. (2021). Changing personality traits with the help of a digital personality change intervention. Proceedings of the National Academy of Sciences, 118(8), e2017548118.

• Wrzus, C., & Roberts, B. W. (2017). Processes of personality development in adulthood: The TESSERA framework. Personality and Social Psychology Review, 21(3), 253-277.